Press for attaching abrasive disks to the wheels of disk grinders.



F. N. & F. E. GARDNER.

- A. M. GARDNER, EXECUTRIX or r. N. GARDNER, nzc'n. PRESS FOR ATTACHING ABRASIVE DISKS TO THE WHEELS 0F DISK GRINDERS. APPLICATION men APR. 3. I911.

1,145,190. Patented July 6,1915.

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COLUMBIA PLANDURAPH co., WASHINGTON, D. c.

F. N. & F. E. GARDNER.

A. M. GARDNER, EXECUTRIX or F. N. GARDNER, 0500.

PRESS FOR ATTACHING ABRASIVE DISKS TO THE WHEELS 0F DISK GRINDERS.

APPLICATION FILED APR. s, 1911.

1,145,190. 7 Patented July 6, 1915.

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FREDERICK N. GARDNER AND FBEDERIG E. GARDNER, OF BELOIT, WISCONSIN,

ASSIGNOR-S 0E ONE-THIRD T0 LOUIS WALDO THOMPSON, OF BELOIT, W'IS- CONSIN; ALICE M. GARDNER EXECUTRIX OF SAID FREDERICK N. GARDNER,

DECEASED.

PRESS FOR ATTACHING ABRASIV E DISKS TOTHE WHEELS OE DISK GRINDERS.

Application filed. April 3, 1911.

To all whom it may concern:

. Be it known that we, FREDERICK N. GARD- NER and FREDERIC E. GARDNER, citizens of the United States, residing at Beloit, in'the county of Rock and. State of Wisconsin, have invented certain new and useful Improvements in Presses for Attaching Abrasive Disks to the Wheels of Disk Grinders, of which the following is a specification.

This invention relates to means for facilitating the application of abrasive disks to the wheels of diskgrinders. Machines of this class include a rotary disk or wheel, to one or both faces of which is secured a disk having an abrading face, the abrasive disk being secured to the wheel by cement or the like. In use, these abrasive disks become worn and must be renewed periodically. Heretofore, in renewing these disks two methods have been followed, one of which is to remove the'wheel from. themachine, removing the worn-out abrasive disk from the wheel, place the wheel on the table of a press specially provided for the purpose, cement a new abrasive disk to the wheel, and then operate the press to firmly and evenly press the disk to the wheel. In grinders having a vertical spindle and a horizontal wheel the abrasive disks have sometimes been pressed to the wheel while on the chine by placing a plate upon the abrasive disk'and then piling upon the plate a considerable weight, such as pieces of old iron. In order to be efficient, however, the weight must be heavy and this tends to injure either the wheel, the spindle, or the step bearing in which the spindle is mounted. Further more, this weight must be handled every time an abrasive disk is to be renewed.

It is the object of our invention to produce an efiicient press of simple, light, and cheap construction which may be used for attaching abrasive disks to grinder wheels without removing said wheels from the machines, and which also may be used for attaching abrasive disks to a grinder wheel or several wheels simultaneously, after said wheels have been removed from the grind- Specification of Letters Patent.

Patented July 6, 1915.

Serial No. 618,711.

ing machine and placed upon a suitable support.

In the accompanying drawings, Figure 1 is a vertical central section through a press embodying the features of our invention, showing its application to a disk grinder. Fig. 2 is a fragmental sectional view showing the means for clamping the press to the disk wheel. Fig. 3 is an end view of one of the clamps. Fig. i is an elevation showing another manner of using the press.

The embodiment of our invention which we have herein shown, by way of example, consists of a sheet metal casing which may comprise a domed wall 1 of conical or inverted funnel shape and a flexible wall or diaphragm 2-having its periphery soldered or otherwise suitably secured to the edge or periphery of the first mentioned wall 'to form a fluid-tight joint between said walls. In the present instance we have provided a rim 3 in the form of an angle iron to which is riveted the peripheries of the walls 1 and 2. It will be understood that in practice the casing may be made in sizes to agree with the sizes of the wheels of disk grinders. At the apex of the conical wall 1 is an opening 4 for the admission ofa suitable pressure fluid, andattached to the wall 1, adjacent to said opening, is a member 5 having a central passage 6 therethrough, communicating with the opening 4:. In the upper end of the member 5 is fixed a nozzle or cock 7 adapted for the attachment of a flexible hose. Leading from the central passage 6 are two pasto the upper face of the wheel C.

When the abrading disk is to be attached to a grinding wheel mounted in 'the machine, the press is secured to the'wheel by suitable means, such as a pluralitv of clamps 10, each of said clamps consisting, in this instance, of a body 11 having a hook 12 at one end adapted to engage a rib upon the rear or under side of the disk 0, a pin 13 slidable in the opposite end of the body 11 and adapted to engage a rib upon the rear or and a thumb screw 14 threaded in the body 11 and'bearing against'the pin 13 to move the latter into clamping engagement with the rim 8. The pin 13 is moved in the opposite direction by a coiled spring 15.

In practice, when the disk D has become worn, said disk may be removed from the wheel C and a new disk cemented to said wheel without removing the wheel from the machine. The press is then secured by meansof clamps 10 to the wheel C with-the I diaphragm 2 lying in contact with the upper face of the abrading diskD. Pressure fluid, such as compressed air or water, is then admitted to the interior of the casing to carry the diaphragm 2 against the abrading disk D to press the latter evenly and closely into contact with the wheel C.

In Fig. 4 we have shown a device comprising a base 16 having a circular table 17 thereon. Upon one side of the base is a bracket 18 which supports a vertical standard 19,1rising to a point some, distance above the table 17. To the upper end of the standard 19 is pivoted a substantially horizontal arm 20 carrying at its outer end a threaded rod 21 vertically adjustable by means of a hand wheel 22, the lower end of said rod supporting a pair of tongs 23. The table 17 is adapted to have one or more disk wheels C laid thereon, two of said wheels being shownin Fig. 4:. The tongs 23 have laterally extending pins Ql at their free ends adapted to enter-recesses in the peripheries of the wheels C so that said wheels may be readily inverted when the wheels are to have abrasive disks D applied to both sides, as they do in certain styles of grinders. After a wheel has been removed from a grinding machine and laid upon the table 17, the

wheel is coated on the upper side with cement and the abrasive disk applied, and then the arm 20 is swung aside from its position a above the table 17 so that the wheel may be inverted with the pins 24: as an axis, whereupon the other side of the wheel may be coated with cement and an abrasive disk applied. The first wheel having been faced on both sides, a second wheel may, if de sired, be similarly treated, being laid upon the first as shown in Fig. 1. When the desired number of wheels have been piled upon the table 17 the diaphragm press 1 is placed upon the topmost wheel with the diaphragm 2 lying in contact with the abrasive disk thereon, and a suitable number of clamps 10 engaged. with the periphery of the press and a rib 17 upon the table 17 to securely hold the diaphragm press in place. Pressure fluid may now be admitted to the casing 1 to firmly clamp all of the wheels C together between the diaphragm 2 and table 17 so that the abrasive disks are securely fixed to the face or faces, as the case may be, of each of the wheels C. V

From the above, it will be apparent'that the present invention provides a very simple and efficient press by means of which abrading disks may be easily applied to the wheels of disk grinders :in the one case, without removing the wheels from the machines and without danger of injury to the machines by the weight of the press, and in theother case, the press being used in combination with a table so that several wheels may be faced at-the same time if desired. Furthermore, the press, being made almost entirely from sheet metal, may be manufactured very cheaply.

We wish to have 1t understood that while 1 i the embodiment herein shown of the invention is the preferred form thereof, the invention is susceptible of modification, wherefore no undue limitation should be understood from the foregoing detailed description.

We claim as our invention:

1. In a press, a casing having a rigid wall and a plane circular side including a flexible diaphragm, said rigid wall bein'gflattened at its periphery to lie parallel with said dia phragm, means for clamping said flattened peripheral portion to the work, and means for admitting pressure fluid to said casing.

2. In a press, a circular casing having a flattened peripheral portion, a clamp comprising a circular rim having an exterior annular flange projecting-at anangle therefrom and a plurality of compressing members having adjustable means for engaging the said annular flange and the work, and

means for admitting pressure fluid tosaid casing. I

3. In a clrcular press, a casing comprising i a rigid wall and a flexible plane circular side,

said wall and said plane side having their edges secured together, a stiflening rim attached to said edges, and adjustable means acting on said stiffening rim for securing said casing to the work.

4:. .In a press, a casing comprislng a conical sheet-metal wall and a circular flexible diaphragm having their edges secured to to said casing and said diaphragm, a pluting compressed air to the interior of said rality of adjustable clamps adapted to enelement.

gage said stifl'ening rim and the work to be In testimony whereof we aflix our signaacted upon, and means for admitting prestures in presence of two witnesses.

5 sure fluid within said casing.

6. A press comprising a dome shaped metallic element having a circular periphery adapted to rest on the work, clamps for se- Witnesses: curing the periphery of said element in close CLARA BANKIN,

10 contact with the work, and means for admit- H. W. ADAMS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

